All weather housing assembly for electronic components

ABSTRACT

An all weather housing assembly for protection of electrical components includes a first housing having an open end and defining a first compartment for receipt therein of electronic components; a cover attached to the first housing for enclosing the first compartment, the cover further including a mounting structure for receiving and retaining a power source which structure is mounted on a side of the cover that is exterior to the enclosed first compartment; and a second housing having an open end and defining a second compartment that is dimensioned to cover and protect a power source when received and retained by the mounting structure of the cover, the second housing being connected to the first housing independent of the attachment of the cover to the first housing.

I. CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a U.S. continuation patent application of,and claims priority under 35 U.S.C. §120 to, U.S. Nonprovisional patentapplication Ser. No. 12/507,017, filed Jul. 21, 2009, which '017application published as U.S. Patent Application Publication No.2009/0283320 A1 on Nov. 19, 2009, which application and publication areeach hereby incorporated herein by reference, and which '017 applicationis a U.S. continuation patent application of, and claims priority under35 U.S.C. §120 to, U.S. Nonprovisional patent application Ser. No.11/423,127, filed Jun. 8, 2006, which application published as U.S.Patent Application Publication No. 2006/0289204 on Dec. 28, 2006 andissued as U.S. Pat. No. 7,563,991 on Jul. 21, 2009, which application,publication, and patent are each hereby incorporated herein byreference, and which application is a nonprovisional of, and claimspriority under 35 U.S.C. §119(e) to Twitchell, U.S. Provisional PatentApplication No. 60/688,737 filed Jun. 8, 2005. The entire disclosure ofthis provisional patent application is hereby incorporated herein byreference. The present application further hereby incorporates byreference each of: U.S. Pat. No. 6,753,775 B2; U.S. Pat. No. 6,745,027B2; U.S. Pat. No. 6,665,585 B2; U.S. Pat. No. 5,458,042; InternationalPatent Application Publication No. WO 03/032501 A2 (designating theUnited States and published in English); International PatentApplication Publication No. WO 03/098851 A1 (designating the UnitedStates and published in English); U.S. Patent Application PublicationNo. 2004/0082296 A1; U.S. Patent Application Publication No.2004/0183673 A1; and U.S. Patent Application Publication No.2004/0021572 A1.

II. COPYRIGHT STATEMENT

All of the material in this patent document is subject to copyrightprotection under the copyright laws of the United States and othercountries. The copyright owner has no objection to the facsimilereproduction by anyone of the patent document or the patent disclosure,as it appears in official governmental records but, otherwise, all othercopyright rights whatsoever are reserved.

III. BACKGROUND OF THE INVENTION

The present invention generally relates to an assembly comprising aremote sensor interface (RSI). RSIs are utilized for remotely collectingdata in the field and communicating the collected data to one or morecentralized locations. For example, RSIs are utilized in tracking andmonitoring assets that are stored and/or transported in association withwireless transceivers, such as radio frequency identification tags(RFIDs). In such implementations, an RSI has been previously referred toas a wireless reader tag or WRT. The data regarding the tracked andmonitored assets is communicated by an RSI to one or more centralservers for processing. Such data is useful, for instance, in supplychain management. Such data further is useful, for instance, in homelandsecurity, especially when the assets being tracked and monitored arebeing imported into the United States from foreign countries.

Of course, the RSI of the present invention preferably is capable ofwireless communications with external devices. For example, the RSIpreferably communicates with other RSIs in forming one or more wirelessnetworks. Furthermore, the RSI preferably communicates with a gatewaythat itself serves as a bridge to other networks, such as the Internet,a cellular network, or a Satellite network.

The present invention relates in particular to an assembly of an RSIthat includes a first housing having an internal compartment forelectronic components and a second housing for receiving power sourcecomponents. The housing for power source components is capable of beingopened separately from the housing for the electronic components forprotection of the electronic components when the power source componentsare serviced or replaced. For example, a battery of an RSI can bereplaced without exposure of electronic components thereof to an outdoorand potentially harsh environment such as that of a sea port, the deckof a sea vessel, a railroad yard, or a truck loading area.

IV. BRIEF DESCRIPTION OF THE DRAWINGS

One or more embodiments of the present invention will be described indetail with reference to the accompanying drawings which are brieflydescribed below, wherein the same elements are referred to with the samereference numerals, and wherein various elements are not necessarilyshown in conformance to any particular absolute or relative scale.

FIG. 1A is a front elevational view of a remote sensor interface (RSI)according to an embodiment of the invention.

FIG. 1B is a top plan view of the RSI of FIG. 1A.

FIG. 1C is a back elevational view of the RSI of FIG. 1A.

FIG. 2 is an exploded perspective view of the RSI of FIG. 1A.

FIG. 3 is a partially exploded perspective view of the RSI of FIG. 1Awith a battery.

FIG. 4 is a perspective view of a first housing, seal, and cover of theRSI of FIG. 1A, shown with optional electronic components.

FIG. 5A is a perspective view of a wireless magnetic seal kit accordingto a preferred embodiment of the invention.

FIG. 5B is a top plan view of the wireless magnetic seal kit of FIG. 5A.

FIG. 5C is a side elevational view of the wireless magnetic seal kit ofFIG. 5A.

FIG. 6 is a partially exploded perspective view of the wireless magneticseal kit of FIG. 5A.

FIG. 7A illustrates an embodiment of a shipping container including theRSI and the magnet housing of the kit of FIG. 5A.

FIG. 7B illustrates a shipping container and an RSI in an arrangementalternative to that of FIG. 7A.

FIG. 8 illustrates a shipping yard including a plurality of the shippingcontainers of FIG. 7A.

V. DETAILED DESCRIPTION

As a preliminary matter, it will readily be understood by one havingordinary skill in the relevant art (“Ordinary Artisan”) that the presentinvention has broad utility and application. Furthermore, any embodimentdiscussed and identified as being “preferred” is considered to be partof a best mode contemplated for carrying out the present invention.Other embodiments also may be discussed for additional illustrativepurposes in providing a full and enabling disclosure of the presentinvention. Moreover, many embodiments, such as adaptations, variations,modifications, and equivalent arrangements, will be implicitly disclosedby the embodiments described herein and fall within the scope of thepresent invention.

Accordingly, while the present invention is described herein in detailin relation to one or more embodiments, it is to be understood that thisdisclosure is illustrative and exemplary of the present invention, andis made merely for the purposes of providing a full and enablingdisclosure of the present invention. The detailed disclosure herein ofone or more embodiments is not intended, nor is to be construed, tolimit the scope of patent protection afforded the present invention,which scope is to be defined by the claims and the equivalents thereof.It is not intended that the scope of patent protection afforded thepresent invention be defined by reading into any claim a limitationfound herein that does not explicitly appear in the claim itself.

Thus, for example, any sequence(s) and/or temporal order of steps ofvarious processes or methods that are described herein are illustrativeand not restrictive. Accordingly, it should be understood that, althoughsteps of various processes or methods may be shown and described asbeing in a sequence or temporal order, the steps of any such processesor methods are not limited to being carried out in any particularsequence or order, absent an indication otherwise. Indeed, the steps insuch processes or methods generally may be carried out in variousdifferent sequences and orders while still falling within the scope ofthe present invention. Accordingly, it is intended that the scope ofpatent protection afforded the present invention is to be defined by theappended claims rather than the description set forth herein.

Additionally, it is important to note that each term used herein refersto that which the Ordinary Artisan would understand such term to meanbased on the contextual use of such term herein. To the extent that themeaning of a term used herein—as understood by the Ordinary Artisanbased on the contextual use of such term—differs in any way from anyparticular dictionary definition of such term, it is intended that themeaning of the term as understood by the Ordinary Artisan shouldprevail.

Furthermore, it is important to note that, as used herein, “a” and “an”each generally denotes “at least one,” but does not exclude a pluralityunless the contextual use dictates otherwise. Thus, reference to “apicnic basket having an apple” describes “a picnic basket having atleast one apple” as well as “a picnic basket having apples.” Incontrast, reference to “a picnic basket having a single apple” describes“a picnic basket having only one apple.”

When used herein to join a list of items, “or” denotes “at least one ofthe items,” but does not exclude a plurality of items of the list. Thus,reference to “a picnic basket having cheese or crackers” describes “apicnic basket having cheese without crackers”, “a picnic basket havingcrackers without cheese”, and “a picnic basket having both cheese andcrackers.” Finally, when used herein to join a list of items, “and”denotes “all of the items of the list.” Thus, reference to “a picnicbasket having cheese and crackers” describes “a picnic basket havingcheese, wherein the picnic basket further has crackers,” as well asdescribes “a picnic basket having crackers, wherein the picnic basketfurther has cheese.”

Turning now to FIGS. 1A-1C, in a preferred embodiment of the invention,a remote sensor interface (RSI) 100 includes a base 102, a first housing104 attached to the base, and a second housing 106 connected to thefirst housing 104 by connectors 108. The second housing 106 is capableof being opened separately from the first housing 104. For example, inthe embodiment illustrated in FIG. 1, the connectors 108 are threadedscrews that can be removed to allow the second housing to be separatedfrom the first housing. Slots 110 are formed in the base 102 forattaching or otherwise mounting of the RSI 100 to a structure such as awall. For example, various connectors such as screws, bolts, rivets, andnails can be passed through the slots and attached to a surface uponwhich the RSI is to be mounted.

In the embodiment illustrated in FIG. 1A-1C, the RSI 100 has outerdimensions of length (L), width (W), and height (H). Though it should beappreciated that the descriptions herein and the accompanying drawingsare not limited to any particular scale or dimension, the RSI 100described herein as an exemplary embodiment has an approximate length of3.3 inches, an approximate width of 2.4 inches, and an approximateheight of 1.0 inch.

As shown in FIG. 2, the first housing 104 defines a first compartment112 that is capable of being closed and sealed. Closure and sealing ofthe first compartment 112 is obtained by pressing a cover 114 intoengagement with the first housing 104 with the seal 116 between thecover and first housing. In the illustrated embodiment, the seal is apliable gasket received by a channel of the first housing and retainedtherein by the cover when the cover is engaged with the first housing ina press fit engagement. The engagement of the cover with the firsthousing can be further supported by an adhesive or connectors such asclips or screws. The first housing 104 and cover 114 are engaged in FIG.3 such that closure and sealing of the first compartment is obtained.

As further shown in FIG. 2, electrical contacts 118 are provided forconducting electrical current from a power source to the interior of thefirst compartment 112. Furthermore, the cover 114 is formed to receive apower source 120, such as a battery, such that the electrical contacts118 conduct electrical current from the power source, through the cover114, and into the closed and sealed first compartment when the cover 114and first housing 104 are engaged as shown in FIG. 3. Moreover, thesecond housing is dimensioned to cover and protect the power source whenthe second housing 106 is connected to the first housing 104 (FIG. 1).

In the illustrated embodiment, the cover 114 is particularly formed toreceive a standard AA battery having opposing positive and negativeterminals; the electrical contacts 118 are formed and disposed tocontact the opposing terminals of the battery; and, the second housing106 is dimensioned to cover and protect the AA battery. It should beappreciated, however, that in other embodiments according to theinvention, other battery sizes and power sources can be accommodated bydifferently shaped and configured cover, electrical contacts, and secondhousing, as desired, so long as such elements are designed for sealingengagement with the first housing 104.

Various electronic components optionally are disposed within the firstcompartment 112. The electronic components are powered by the powersource 120 by way of the electrical contacts 118. The electroniccomponents are sealed and protected between the first housing 104 andcover 114 when closure and sealing of the first compartment is obtainedas shown in FIG. 3. Sealing and closure of the first compartment is notlost when the second housing 106 is separated from the first housing104. Thus the power source 120 can be routinely serviced or replacedwithout disturbing the first compartment and without exposing anyelectronic components within the first compartment to potentially harshexternal conditions. For example, insofar as the RSI 100 is attached toa land-sea container on the deck of a cargo ship, the battery of the RSIcan be replaced without exposing the electronic components of the RSI tomoisture and corrosive salty conditions.

Several exemplary electronic components are shown in FIG. 4 as printedcircuit assembly (PCA) cards, which preferably include printed circuitboards. A first PCA card 122 preferably includes components comprising awake-up receiver circuit for receiving wireless wake-up signals andprompting wake up of the RSI. The components of the wake-up receivercircuit include an etched antenna on the printed circuit board of thePCA card. The wake-up receiver circuit preferably has a relatively lowpower consumption rate compared to that of a standards based radio ofthe RSI. Furthermore, the wake-up receiver circuit preferably executes astepped wake up sequence for minimizing power consumption of the RSI toavoid frequent power source servicing such as the changing of a battery.

Another PCA card 124 preferably includes a standards based radio fortwo-way wireless communications with one or more gateways and/or one ormore other RSIs. Such standards based radio preferably comprises aBluetooth radio or WiFi radio. The PCA card 124 preferably communicateswith a gateway for receiving commands, communicating data acquired viaits sensors, and/or forwarding data collected and communicated fromanother RSI. In this regard, the PCA card 124 preferably is used by theRSI in forming ad-hoc networks and in relaying communications betweenother RSI units and a gateway.

As further shown in FIG. 4, a PCA card 126 comprising a sensor interfacealso is provided for acquiring data from one or more sensors associatedwith the RSI. Insofar as the RSI is associated with assets, such asshipping containers and contents thereof, the RSI preferably is capableof interfacing with sensors that, for example, monitor the assets,environmental characteristics of the assets, and/or geographicallocations of the assets. In some embodiments, the sensor is includedwithin the RSI, as in the example of FIGS. 5-7; in other embodiments,the sensor is external to the RSI but nevertheless disposed inelectronic communication with the sensor interface for data exchangethere between. Electronic communication between the sensor interface anda sensor is exchanged wirelessly in some embodiments of the inventionand by way of cabled connections in other embodiments. In at least oneembodiment, the sensor interface comprises a multi-conductor connector,such as a ribbon cable, that passes from the interior of an RSI and toan external sensor, sensor array, or docking station that receives theRSI. Exemplary sensors include, but are not limited to, electronicseals, magnetic seals, cameras, microphones, temperature sensors,humidity sensors, radiation sensors, and motion sensors.

Each PCA card 122,124,126 of FIG. 4 has a number of electrical contacts(not shown) corresponding to electrical contacts of the first housing104. In assembling the RSI, each card is pressed into an available cardslot in the first compartment 112 of the first housing 104 with theelectrical contacts of the card abutting corresponding electricalcontacts of the first housing 104. The cards are physically supported byrails within the first compartment when pressed into an available slot.For example, rails 128 for receiving and supporting the PCA card 126comprising the sensor interface are visible in FIG. 4. Accordingly, itwill be appreciated that each PCA card is easily installed and removedfor replacement, upgrade, or servicing, much like card components of apersonal computer.

When the PCA cards 122,124,126 of FIG. 4 are installed within the firstcompartment 112, and the cover 114 and first housing 104 are engagedwith the seal 116 therebetween, closure and sealing of the firstcompartment is obtained. Servicing or replacing of the battery 120 ispossible, as shown in FIG. 3, without removing the cover from engagementwith the first housing 104.

Turning now to an illustrative example according to a preferredembodiment of the invention, as shown in FIGS. 5A-5C and FIG. 6, awireless magnetic seal kit 200 includes an RSI 202, a magnet housing204, and a mounting template 206. The RSI 202 includes at least a PCAcard 124 comprising a standards based radio as shown in FIG. 4, and aPCA card 126 comprising a sensor interface that includes, in thisparticular embodiment, a magnetic field sensor. The magnet housing 204includes a magnet having a magnetic field. Close proximity of the magnethousing 204 to the RSI 202, as shown in FIG. 5C, may be indicative of,for example, the presence of a monitored asset, or the closure of amonitored door, cover, or window. Conversely, removal of the magnethousing 204 from close proximity to the RSI may be indicative of, forexample, the loss of presence of a monitored asset, or the opening of amonitored door, cover, or window. Moreover, removal of the magnethousing from close proximity to the RSI is an event detected by themagnetic field sensor of the sensor interface of the RSI, and such eventmay be evidence that, for example, a monitored asset has been lost orsubjected to tampering, or that a monitored door, cover, window,closure, or seal has been opened, compromised, or defeated. Detection ofsuch an event preferably results in the RSI reporting the event to acentral location via one or more RSIs and/or a gateway. Furthermore theRSI may promptly send a signal reporting the event, or the RSI mayrecord the event for later reporting, particularly if the RSI is out ofcommunication range with one or more RSIs and/or a gateway.

The mounting template 206 of the kit 200 is provided to facilitateconvenience in mounting the RSI 202 and magnet housing 204 ontorespective surfaces. Guide holes 208 formed in the template 206correspond to mounting holes formed in the magnet housing 204. Guideholes 210 formed in the template correspond to the slots 212 formed inthe base 214 of the RSI 202. The guide holes of the template are usefulto guide a marking pen or drill bit so that respective surfaces uponwhich the RSI and magnet housing are to be mounted can be pre-drilledwith holes for receiving mounting connectors such as screws, bolts, orrivets. Once such holes are formed, the RSI and magnet housing aremounted to the respective surfaces.

Continuing in the illustrative example, in FIG. 7A, which is notintended to be drawn to scale, an embodiment 700 in accordance with theinvention includes an RSI 202 mounted to a first door 222 of a container220, such as a maritime or land-sea shipping container. A magnet housing204 is mounted to a second door 224. So long as the doors remain closed,close proximity of the magnet housing to the RSI is maintained. However,if either door is opened, close proximity of the magnet housing to theRSI is lost and opening of the door is detected by the RSI, and thedetection preferably is reported to an external device such as agateway.

In another illustrative arrangement, in FIG. 7B, the RSI 202 is mountedto a frame member of a shipping container and the magnet housing 204 ismounted to a door of the container. In this arrangement, the RSI 202remains stationary as the door is opened and closed, thus fatigue of theRSI 202 by mechanical vibration is minimized. In yet anotherarrangement, an RSI is mounted within a container and thus is shelteredfrom environmental conditions external to the container.

A shipping yard including a plurality of embodiments 700 according toFIG. 7A is illustrated in FIG. 8. As will be appreciated, each RSImonitors the state of its respective shipping container, i.e., whetherthe container is closed or open, and/or whether the state has changed,i.e., whether the container has been closed or opened. Further datamonitoring may include the time period in which the container is in aparticular state. Each RSI communicates wirelessly via the standardsbased radio of its respective PCA card 124 with one or more other RSIsand/or the gateway 820, which gateway 820 preferably is disposed inelectronic communication with a wide area network, such as the Internet,a Satellite network, and/or a cellular network. In this regard, thegateway 820 may be connected via wire or cable, or wirelessly, to thewide area network.

Based on the foregoing description, it will be readily understood bythose persons skilled in the art that the present invention issusceptible of broad utility and application. Accordingly, while one ormore embodiments of the present invention have been described herein indetail, it is to be understood that this disclosure is only illustrativeand exemplary and is made merely for the purpose of providing a full andenabling disclosure of the invention. The foregoing disclosure is notintended to be construed to limit the present invention or otherwiseexclude any other embodiments, adaptations, variations, modifications orequivalent arrangements, the scope of the invention being limited onlyby the claims of an issued patent and the equivalents thereof.

1. (canceled)
 2. A system for tracking an asset by an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identity affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identity and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identity and the measurable parameter from the second RFID device and communicates the first and second identity and the measurable parameter to the RFID reader.
 3. A system in accordance with claim 2 wherein the RFID device comprises a transmitter for communicating the first and second identity and the measurable parameter to the RFID reader.
 4. A system in accordance with claim 2 wherein the measurable parameter comprises detection of presence of the second RFID device.
 5. A system in accordance with claim 4 wherein the measurable parameter comprises detection of absence of the second RFID device.
 6. A system in accordance with claim 2 wherein the first RFID device further comprises a communication device for communicating the first and second identity to an RFID reader.
 7. A system in accordance with claim 2 wherein the first RFID device comprises an active RFID device.
 8. A system in accordance with claim 2 wherein the second RFID device comprises a passive RFID device.
 9. A method for asset tracking by a reader comprising the steps of: affixing a first RFID device having a first identification symbol to an asset; affixing a second RFID device having a second identification symbol to a locking mechanism affixed to the asset, the second identification symbol including behavior information indicating whether the locking mechanism is locked or unlocked; and communicating the second identification symbol to the first RFID device for subsequent transmission to the reader.
 10. A system for tracking an asset by an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to the RFID reader.
 11. A system for tracking an asset by an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to the RFID reader.
 12. A system for tracking an asset by an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed proximate the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to the RFID reader.
 13. A system for tracking an asset by an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the sensor data from the second RFID device and communicates the first and second identifications and the sensor data to the RFID reader.
 14. A system for tracking an asset by an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the event data from the second RFID device and communicates the first and second identifications and the event data to the RFID reader.
 15. A system for tracking an asset by an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed proximate the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to the RFID reader.
 16. A system for tracking an asset by an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the sensor data from the second RFID device and communicates the first and second identifications and the sensor data to the RFID reader.
 17. A system for tracking an asset by an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the event data from the second RFID device and communicates the first and second identifications and the event data to the RFID reader.
 18. A system for tracking an asset by an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed on the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to the RFID reader.
 19. A system for tracking an asset by an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed on the mechanism and comprising a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the sensor data from the second RFID device and communicates the first and second identifications and the sensor data to the RFID reader.
 20. A system for tracking an asset by an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed on the mechanism and comprising a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the event data from the second RFID device and communicates the first and second identifications and the event data to the RFID reader.
 21. A system for tracking an asset using an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to the RFID reader.
 22. A system for tracking an asset using an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to the RFID reader.
 23. A system for tracking an asset using an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed proximate the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to the RFID reader.
 24. A system for tracking an asset using an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the sensor data from the second RFID device and communicates the first and second identifications and the sensor data to the RFID reader.
 25. A system for tracking an asset using an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the event data from the second RFID device and communicates the first and second identifications and the event data to the RFID reader.
 26. A system for tracking an asset using an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed proximate the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to the RFID reader.
 27. A system for tracking an asset using an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the sensor data from the second RFID device and communicates the first and second identifications and the sensor data to the RFID reader.
 28. A system for tracking an asset using an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the event data from the second RFID device and communicates the first and second identifications and the event data to the RFID reader.
 29. A system for tracking an asset using an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed on the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to the RFID reader.
 30. A system for tracking an asset using an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed on the mechanism and comprising a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the sensor data from the second RFID device and communicates the first and second identifications and the sensor data to the RFID reader.
 31. A system for tracking an asset using an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed on the mechanism and comprising a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the event data from the second RFID device and communicates the first and second identifications and the event data to the RFID reader.
 32. A system for tracking an asset using a device comprising an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to the device comprising an RFID reader.
 33. A system for tracking an asset using a device comprising an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to the device comprising an RFID reader.
 34. A system for tracking an asset using a device comprising an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed proximate the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to the device comprising an RFID reader.
 35. A system for tracking an asset using a device comprising an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the sensor data from the second RFID device and communicates the first and second identifications and the sensor data to the device comprising an RFID reader.
 36. A system for tracking an asset using a device comprising an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the event data from the second RFID device and communicates the first and second identifications and the event data to the device comprising an RFID reader.
 37. A system for tracking an asset using a device comprising an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed proximate the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to the device comprising an RFID reader.
 38. A system for tracking an asset using a device comprising an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the sensor data from the second RFID device and communicates the first and second identifications and the sensor data to the device comprising an RFID reader.
 39. A system for tracking an asset using a device comprising an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the event data from the second RFID device and communicates the first and second identifications and the event data to the device comprising an RFID reader.
 40. A system for tracking an asset using a device comprising an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed on the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to the device comprising an RFID reader.
 41. A system for tracking an asset using a device comprising an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed on the mechanism and comprising a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the sensor data from the second RFID device and communicates the first and second identifications and the sensor data to the device comprising an RFID reader.
 42. A system for tracking an asset using a device comprising an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed on the mechanism and comprising a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the event data from the second RFID device and communicates the first and second identifications and the event data to the device comprising an RFID reader.
 43. A system for tracking an asset, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to a device comprising an RFID reader.
 44. A system for tracking an asset, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to a device comprising an RFID reader.
 45. A system for tracking an asset, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed proximate the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to a device comprising an RFID reader.
 46. A system for tracking an asset, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the sensor data from the second RFID device and communicates the first and second identifications and the sensor data to a device comprising an RFID reader.
 47. A system for tracking an asset, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the event data from the second RFID device and communicates the first and second identifications and the event data to a device comprising an RFID reader.
 48. A system for tracking an asset, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed proximate the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to a device comprising an RFID reader.
 49. A system for tracking an asset, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the sensor data from the second RFID device and communicates the first and second identifications and the sensor data to a device comprising an RFID reader.
 50. A system for tracking an asset, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the event data from the second RFID device and communicates the first and second identifications and the event data to a device comprising an RFID reader.
 51. A system for tracking an asset, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed on the mechanism and comprising a second identification and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the measurable parameter from the second RFID device and communicates the first and second identifications and the measurable parameter to a device comprising an RFID reader.
 52. A system for tracking an asset, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed on the mechanism and comprising a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the sensor data from the second RFID device and communicates the first and second identifications and the sensor data to a device comprising an RFID reader.
 53. A system for tracking an asset, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed on the mechanism and comprising a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the event data from the second RFID device and communicates the first and second identifications and the event data to a device comprising an RFID reader.
 54. A system for tracking an asset using an RFID reader, the system comprising: a mechanism of the asset configured to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the mechanism and including a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the sensor data from the second RFID device and communicates the first and second identifications and the sensor data to the RFID reader.
 55. A system for tracking an asset using an RFID reader, the system comprising: a door of the asset configured to allow access to the asset when the door is in a first position and to deny access to the asset when the door is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the door and including a second identification and sensor data indicating whether the door is in the first or second position, wherein the first RFID device receives the second identification and the sensor data from the second RFID device and communicates the first and second identifications and the sensor data to the RFID reader.
 56. A system for tracking an asset using an RFID reader, the system comprising: a door of the asset configured to allow access to the asset when the door is in a first position and to deny access to the asset when the door is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the door and including a second identification and event data indicating whether the door is in the first or second position, wherein the first RFID device receives the second identification and the event data from the second RFID device and communicates the first and second identifications and the event data to the RFID reader.
 57. A system for tracking an asset using an electronic device comprising an RFID reader, the system comprising: a door of the asset configured to allow access to the asset when the door is in a first position and to deny access to the asset when the door is in a second position; a first remote sensor interface having a first identification affixable to the asset; and a second remote sensor interface disposed with the door and including a second identification and sensor data indicating whether the door is in the first or second position, wherein the first remote sensor interface receives the second identification and the sensor data from the second remote sensor interface and communicates the first and second identifications and the sensor data to the electronic device comprising an RFID reader.
 58. A system for tracking an asset using an electronic device comprising an RFID reader, the system comprising: a door of the asset configured to allow access to the asset when the door is in a first position and to deny access to the asset when the door is in a second position; a first remote sensor interface having a first identification affixable to the asset; and a second remote sensor interface disposed with the door and including a second identification and event data indicating whether the door is in the first or second position, wherein the first remote sensor interface receives the second identification and the event data from the second remote sensor interface and communicates the first and second identifications and the event data to the electronic device comprising an RFID reader.
 59. A system for tracking an asset using an electronic device comprising an RFID reader, the system comprising: a door of the asset configured to allow access to the asset when the door is in a first position and to deny access to the asset when the door is in a second position; a first wireless reader tag having a first identification affixable to the asset; and a second wireless reader tag disposed with the door and including a second identification and sensor data indicating whether the door is in the first or second position, wherein the first wireless reader tag receives the second identification and the sensor data from the second wireless reader tag and communicates the first and second identifications and the sensor data to the electronic device comprising an RFID reader.
 60. A system for tracking an asset using an electronic device comprising an RFID reader, the system comprising: a door of the asset configured to allow access to the asset when the door is in a first position and to deny access to the asset when the door is in a second position; a first wireless reader tag having a first identification affixable to the asset; and a second wireless reader tag disposed with the door and including a second identification and event data indicating whether the door is in the first or second position, wherein the first wireless reader tag receives the second identification and the event data from the second wireless reader tag and communicates the first and second identifications and the event data to the electronic device comprising an RFID reader.
 61. A system for tracking an asset using an electronic device comprising an RFID reader, the system comprising: a door of the asset configured to allow access to the asset when the door is in a first position and to deny access to the asset when the door is in a second position; a first wireless reader tag having a first identification affixable to the asset; and a second wireless reader tag disposed with the door and including a second identification and sensor data indicating whether the door is in the first or second position, wherein the first wireless reader tag receives the second identification and the sensor data from the second wireless reader tag and communicates the first and second identifications and the sensor data to the electronic device comprising an RFID reader.
 62. A system for tracking an asset using an electronic device comprising an RFID reader, the system comprising: a door of the asset configured to allow access to the asset when the door is in a first position and to deny access to the asset when the door is in a second position; a first wireless reader tag having a first identification affixable to the asset; and a second wireless reader tag disposed with the door and including a second identification and event data indicating whether the door is in the first or second position, wherein the first wireless reader tag receives the second identification and the event data from the second wireless reader tag and communicates the first and second identifications and the event data to the electronic device comprising an RFID reader.
 63. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when a mechanism of the seal is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the seal and including a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the sensor data from the second RFID device and communicates the first and second identifications and the sensor data to the RFID reader.
 64. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when the seal is in a first state and to deny access to the asset when the seal is in a second state; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the seal and including a second identification and sensor data indicating whether the seal is in the first or second state, wherein the first RFID device receives the second identification and the sensor data from the second RFID device and communicates the first and second identifications and the sensor data to the RFID reader.
 65. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when a mechanism of the seal is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the seal and including a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identification and the event data from the second RFID device and communicates the first and second identifications and the event data to the RFID reader.
 66. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when the seal is in a first state and to deny access to the asset when the seal is in a second state; a first RFID device having a first identification affixable to the asset; and a second RFID device disposed with the seal and including a second identification and event data indicating whether the seal is in the first or second state, wherein the first RFID device receives the second identification and the event data from the second RFID device and communicates the first and second identifications and the event data to the RFID reader.
 67. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when a mechanism of the seal is in a first position and to deny access to the asset when the mechanism is in a second position; a first remote sensor interface having a first identification affixable to the asset; and a second remote sensor interface disposed with the seal and including a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first remote sensor interface receives the second identification and the sensor data from the second remote sensor interface and communicates the first and second identifications and the sensor data to the RFID reader.
 68. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when the seal is in a first state and to deny access to the asset when the seal is in a second state; a first remote sensor interface having a first identification affixable to the asset; and a second remote sensor interface disposed with the seal and including a second identification and sensor data indicating whether the seal is in the first or second state, wherein the first remote sensor interface receives the second identification and the sensor data from the second remote sensor interface and communicates the first and second identifications and the sensor data to the RFID reader.
 69. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when a mechanism of the seal is in a first position and to deny access to the asset when the mechanism is in a second position; a first remote sensor interface having a first identification affixable to the asset; and a second remote sensor interface disposed with the seal and including a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first remote sensor interface receives the second identification and the event data from the second remote sensor interface and communicates the first and second identifications and the event data to the RFID reader.
 70. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when the seal is in a first state and to deny access to the asset when the seal is in a second state; a first remote sensor interface having a first identification affixable to the asset; and a second remote sensor interface disposed with the seal and including a second identification and event data indicating whether the seal is in the first or second state, wherein the first remote sensor interface receives the second identification and the event data from the second remote sensor interface and communicates the first and second identifications and the event data to the RFID reader.
 71. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when a mechanism of the seal is in a first position and to deny access to the asset when the mechanism is in a second position; a first remote sensor interface having a first identification affixable to the asset; and a second remote sensor interface disposed with the seal and including a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first remote sensor interface receives the second identification and the sensor data from the second remote sensor interface and communicates the first and second identifications and the sensor data to the RFID reader.
 72. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when the seal is in a first state and to deny access to the asset when the seal is in a second state; a first remote sensor interface having a first identification affixable to the asset; and a second remote sensor interface disposed with the seal and including a second identification and sensor data indicating whether the seal is in the first or second state, wherein the first remote sensor interface receives the second identification and the sensor data from the second remote sensor interface and communicates the first and second identifications and the sensor data to the RFID reader.
 73. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when a mechanism of the seal is in a first position and to deny access to the asset when the mechanism is in a second position; a first remote sensor interface having a first identification affixable to the asset; and a second remote sensor interface disposed with the seal and including a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first remote sensor interface receives the second identification and the event data from the second remote sensor interface and communicates the first and second identifications and the event data to the RFID reader.
 74. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when the seal is in a first state and to deny access to the asset when the seal is in a second state; a first remote sensor interface having a first identification affixable to the asset; and a second remote sensor interface disposed with the seal and including a second identification and event data indicating whether the seal is in the first or second state, wherein the first remote sensor interface receives the second identification and the event data from the second remote sensor interface and communicates the first and second identifications and the event data to the RFID reader.
 75. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when a mechanism of the seal is in a first position and to deny access to the asset when the mechanism is in a second position; a first wireless reader tag having a first identification affixable to the asset; and a second wireless reader tag disposed with the seal and including a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the first wireless reader tag receives the second identification and the sensor data from the second wireless reader tag and communicates the first and second identifications and the sensor data to the RFID reader.
 76. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when the seal is in a first state and to deny access to the asset when the seal is in a second state; a first wireless reader tag having a first identification affixable to the asset; and a second wireless reader tag disposed with the seal and including a second identification and sensor data indicating whether the seal is in the first or second state, wherein the first wireless reader tag receives the second identification and the sensor data from the second wireless reader tag and communicates the first and second identifications and the sensor data to the RFID reader.
 77. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when a mechanism of the seal is in a first position and to deny access to the asset when the mechanism is in a second position; a first wireless reader tag having a first identification affixable to the asset; and a second wireless reader tag disposed with the seal and including a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first wireless reader tag receives the second identification and the event data from the second wireless reader tag and communicates the first and second identifications and the event data to the RFID reader.
 78. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when the seal is in a first state and to deny access to the asset when the seal is in a second state; a first wireless reader tag having a first identification affixable to the asset; and a second wireless reader tag disposed with the seal and including a second identification and event data indicating whether the seal is in the first or second state, wherein the first wireless reader tag receives the second identification and the event data from the second wireless reader tag and communicates the first and second identifications and the event data to the RFID reader.
 79. The method of any of claims 63-78, wherein the seal comprises a magnetic seal.
 80. The method of any of claims 63-78, wherein the seal comprises an electronic seal.
 81. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when a mechanism of the seal is in a first position and to deny access to the asset when the mechanism is in a second position; a first wireless reader tag having a first identification affixable to the asset; and a second wireless reader tag disposed with the seal and including a second identification and event data indicating whether the mechanism is in the first or second position, wherein the first wireless reader tag receives the second identification and the event data from the second wireless reader tag and communicates the first and second identifications and the event data to the RFID reader.
 82. A system for tracking an asset by an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a wireless reader tag having a first identification affixable to the asset; and a remote sensor interface including a seal disposed with the mechanism and comprising a second identification and sensor data from the seal indicating whether the mechanism is in the first or second position, wherein the wireless reader tag receives the second identification and the sensor data from the remote sensor interface and communicates the first and second identification and the measurable parameter to the RFID reader.
 83. A system for tracking an asset by an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a wireless reader tag having a first identification affixable to the asset; and a remote sensor interface including a seal disposed with the mechanism and comprising a second identification and sensor data from the seal indicating whether the mechanism is in the first or second position, wherein the wireless reader tag receives the second identification and the sensor data from the remote sensor interface and communicates the first and second identification and the sensor data to the RFID reader.
 84. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when the seal is in a first position and to deny access to the asset when the seal is in a second position; a first remote sensor interface having a first identification affixable to the asset; and a second remote sensor interface disposed with the seal and including a second identification and event data indicating whether the seal is in the first or second position, wherein the first remote sensor interface receives the second identification and the event data from the second remote sensor interface and communicates the first and second identifications and the event data to the RFID reader.
 85. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when the seal is in a first position and to deny access to the asset when the seal is in a second position; a first wireless reader tag having a first identification affixable to the asset; and a second wireless reader tag disposed with the seal and including a second identification and sensor data indicating whether the seal is in the first or second position, wherein the first wireless reader tag receives the second identification and the sensor data from the second wireless reader tag and communicates the first and second identifications and the sensor data to the RFID reader.
 86. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when the seal is in a first position and to deny access to the asset when the seal is in a second position; a first wireless reader tag having a first identification affixable to the asset; and a second wireless reader tag disposed with the seal and including a second identification and event data indicating whether the seal is in the first or second position, wherein the first wireless reader tag receives the second identification and the event data from the second wireless reader tag and communicates the first and second identifications and the event data to the RFID reader.
 87. The method of any of claims 81-86, wherein the seal comprises a magnetic seal.
 88. The method of any of claims 81-86, wherein the seal comprises an electronic seal.
 89. A system for tracking an asset by an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a gateway having a first identification affixable to the asset; and a remote sensor interface comprising a seal disposed with the mechanism and comprising a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the gateway receives the second identification and the sensor data from the remote sensor interface and communicates the first and second identification and the sensor data to the RFID reader.
 90. A system for tracking an asset by a device including an RFID reader, the system comprising: a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a gateway having a first identification affixable to the asset; and a remote sensor interface comprising a seal disposed with the mechanism and comprising a second identification and sensor data indicating whether the mechanism is in the first or second position, wherein the gateway receives the second identification and the sensor data from the remote sensor interface and communicates the first and second identification and the sensor data to the device including an RFID reader.
 91. The system of claim 90, wherein the device including an RFID reader is another gateway.
 92. A system for tracking an asset using an RFID reader, the system comprising: a seal disposed on the asset to allow access to the asset when the seal is in a first position and to deny access to the asset when the seal is in a second position; a first remote sensor interface having a first identification affixable to the asset; and a second remote sensor interface disposed with the seal and including a second identification and sensor data indicating whether the seal is in the first or second position, wherein the first remote sensor interface receives the second identification and the sensor data from the second remote sensor interface and communicates the first and second identifications and the sensor data to the RFID reader.
 93. A system for tracking an asset using an RFID reader of a device, the system comprising: a seal disposed on the asset to allow access to the asset when the seal is in a first position and to deny access to the asset when the seal is in a second position; a first remote sensor interface having a first identification affixable to the asset; and a second remote sensor interface disposed with the seal and including a second identification and sensor data indicating whether the seal is in the first or second position, wherein the first remote sensor interface receives the second identification and the sensor data from the second remote sensor interface and communicates the first and second identifications and the sensor data to the RFID reader of the device.
 94. A system for tracking an asset using a wireless reader tag of a device, the system comprising: a seal disposed on the asset to allow access to the asset when the seal is in a first position and to deny access to the asset when the seal is in a second position; a first remote sensor interface having a first identification affixable to the asset; and a second remote sensor interface disposed with the seal and including a second identification and sensor data indicating whether the seal is in the first or second position, wherein the first remote sensor interface receives the second identification and the sensor data from the second remote sensor interface and communicates the first and second identifications and the sensor data to the wireless reader tag of the device.
 95. A system in accordance with claim 92 wherein the second remote sensor interface comprises a transmitter for communicating the first and second identification and the sensor data to the RFID reader.
 96. A system in accordance with claim 2 wherein the first remote sensor interface further comprises a communication device for communicating the first and second identification to an RFID reader.
 97. A system in accordance with claim 2 wherein the first remote sensor interface comprises an active RFID device.
 98. A system in accordance with claim 2 wherein the second remote sensor interface comprises a passive RFID device.
 99. A method for asset tracking by a reader comprising the steps of: affixing a first RFID device having first information to an asset; affixing a second RFID device having second information to a locking mechanism affixed to the asset, the second information including behavior information indicating whether the locking mechanism is locked or unlocked; and communicating the second identification symbol to the first RFID device for subsequent transmission to the reader.
 100. The method of claim 99, wherein the first information includes an identification.
 101. A method for asset tracking by a reader comprising the steps of: affixing a first RFID device having first information to an asset; affixing a second RFID device having second information to a locking mechanism affixed to the asset, the second information including information indicating whether the locking mechanism is locked or unlocked; and communicating the second information to the first RFID device for subsequent transmission to the reader.
 102. A method for asset tracking by a reader comprising the steps of: affixing a first RFID device having a first identification to an asset; affixing a second RFID device having a second identification to a locking mechanism affixed to the asset, the second identification including behavior information indicating whether the locking mechanism is locked or unlocked; and communicating the second identification to the first RFID device for subsequent transmission to the reader.
 103. A method for asset tracking by a reader comprising the steps of: affixing a first RFID device having a first identification to an asset; affixing a second RFID device having a second identification to a locking mechanism affixed to the asset, the second identification including behavior information indicating a state condition of the locking mechanism; and communicating the second identification to the first RFID device for subsequent transmission to the reader.
 104. A method for asset tracking by a reader comprising the steps of: affixing a first RFID device having a first identification to an asset; affixing a second RFID device having a second identification to a locking mechanism affixed to the asset, the second identification including behavior information indicating an open/closed state of the locking mechanism; and communicating the second identification to the first RFID device for subsequent transmission to the reader.
 105. A method for asset tracking by a reader comprising the steps of: affixing a first RFID device having a first identification to an asset; affixing a second RFID device having a second identification to a locking mechanism of the asset, the second identification including behavior information indicating an open/closed state of the locking mechanism; and communicating the second identification to the first RFID device for subsequent transmission to the reader.
 106. A method for asset tracking by a reader comprising the steps of: affixing a remote sensor interface having a first identification to an asset; affixing a seal to a locking mechanism affixed to the asset, the seal including sensor data indicating whether the locking mechanism is locked or unlocked; and communicating the sensor data to the remote sensor interface for subsequent transmission to the reader. 